The Berthong Creek, a mostly–perennial river that is part of the Lachlan sub-catchment of the Murrumbidgee catchment within the Murray–Darling basin, is located in the South West Slopes, and Riverina regions of New South Wales, Australia. The Berthong Creek is only connected to the Murray Darling basin when the Bland Creek, the Lachlan and Murrumbidgee Rivers are in flood.

The Berthong Creek (technically a river) rises west of Wombat, between the towns of Stockinbingal and Young, and flows generally north by west, joined by one minor tributary, before reaching its confluence with the Bland Creek. The creek descends 182 metres (597 ft) over its 40-kilometre (25 mi) course. The creek is impounded by the Berthong Dam south of Yannawah.

• List of rivers of New South Wales (A-K)
• Rivers of New South Wales

• "Lachlan River catchment" (map). Office of Environment and Heritage. Government of New South Wales.
• "Bland Creek Catchment Committee". LachLandcare Inc. Archived from the original on 11 December 2014.
• Trueman, Will (2012). True Tales of the Trout Cod: River Histories of the Murray–Darling Basin (Lachlan River catchment booklet) (PDF). Canberra: Murray–Darling Basin Authority. ISBN 978-1-921914-98-0. Archived from the original (PDF) on 25 February 2014.